Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26a6a8b616d63e2…

MALICIOUS

PDF

72.3 KB Created: 2021-09-05 07:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78fbf95167163f3aa6c48f5e86a05b86 SHA-1: f8b04c0dbb4797f6b4e01c92b032842904a408ba SHA-256: c26a6a8b616d63e23570fcb6daa57fe91889949cbc4bacb4b88627b6d4451bfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to external websites, including some hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, and the document body was unreadable, limiting the analysis to the URL structure and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feltshoe.com/userfiles/file/loxibukemifefiwagitazudu.pdf In PDF document text
    • http://cariboohose.com/userfiles/file/roneru.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/50118007661.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c13d5e16f---9809050844.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125bea955a5b---4433849570.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/48272572451.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/73041984534.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/31299377347.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/479dfd0085995600870d9ca6e2e3ba99/27214418744.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/08df3c965e2ce6122c96c896436ef1e3/31728570128.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610990567fd53---35753001927.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/jobivobo.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/sabof.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607265e8db720---25833170359.pdfIn PDF document text
    • https://sayurhijau.com/contents/files/81296078924.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b43d2156f---sosegorolada.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/42809660692.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/71137795990.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ed36bef61afad9b129cf932336631161/95636155363.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/1688250118.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/83190162593.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/67242286281.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/f29r7avd09999vrpi4pr755j9u/80080243856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=principle+of+pavement+design+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BC 15844 bytes
SHA-256: 320d0230f4bab2a8c1aad344b1948df47516fd7ed3d8d0a9be0f2439eabf0fc5
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA58 11028 bytes
SHA-256: 0d660bdc699b20227f0684d2d13bb8d9bbc96ab83b40287e87e4a27e8ae66e79

Open this report in the interactive analyzer, or submit your own file for analysis.